INDEX 



References to figures are printed in thick type (248, 197) ; to systematic position, 

 in italics {391, 430) 



Abe ALIA, 391 



Absorption of internal portions of 



shell, 259 

 Abyssal Mollusca, 374 

 Acanthinula, 441 

 Acanthoceras, 399 

 Acanthochiton, 403, 403 

 Acanthodoris, 434 

 Acantliopleura, 403 ; eyes, 188 

 Acavus, 308, 304, 335, 44I 

 Acera, 245, 430 

 Achatina, 278, 328-337, 333, 443, 443 ; 



jaw, 211 ; food, 33 ; size of egg, 124 ; 



A. fulica, 279 

 AchatineUa, 278, 326, 327, 443 ; radula, 



234 ; musical sounds, 51 

 Achatinelloides, 332 

 Acicula, 287, 296, 414 

 Acmaea, 405 ; radula, 227 

 Acme, 414 

 Acmella, 314, 415 

 Acroptychia, 336, 414 

 Acrotreta, 504, 508 

 Actaeon, 250, 427, 428, 4S9 ; radula, 



217, 230 ; streptoneurous, 203 n. 

 Actaeonella, 430 

 Actaeonia, 4^2 

 Actaeoiiina, 250, 429 

 Actinoceras, 394 

 Actinodonta, 44'^ 

 Acusta, 306, 316, 318, 441 

 Adacna, 12, 297, 455 

 Adalaria, 434 

 Adamsiella, 414 

 Addisonia, 412 

 Adelphoceras, 395 

 Adeorbis, 4I6 

 Admete, 426 

 Aegires, 434 

 Apgista, 305, 316, 44I 

 Aegoceraff, 398 



Aeolis^ 10, 152, 4S2 ; radula, 217, 

 229 ; stinging cells, 65 ; mimicked 

 by Sagartia, 68 ; warning colora- 

 tion, 72 



Aerope, 328, 333, 440 ; radula, 215 ; 

 habits, 54 



Aestivation, 25 



Aetheria, 328-336, 452; variation, 92 



Afncarion, 333, 440 



Agaronia, 426 



Age of snails, 39 



Aglossa, 7 



Agnatha, habits, 51 



Akiodoris, 434 



Alaha, 415 



Alaria, 4IS 



Alariopsis, 420 



Albersia, 320 



Albino varieties, 87 



Alcadia, 348-351, 410 



Alderia, 432 



Alexia, 439 



Alicia, 459 



Allognathus, 441 



Allopagus, 452 



Alloposidae, 384 



Alvania, 415 



Alycaeus, 266, 302 f., 309, 319, 414 



Amalia, 440 



Amalthea, 78 



Amaltheus, 398 



Amastra, 443 



Amaura, 41I 



Amherleya, 409 



Amb onychia, 449 



Amicula, 404 



Ammonites, 247, 393, 398, ,555; sutures, 

 396 ; aptychus, 397 



Ammonoidea, 396 f. 

 I Amnicola, 325, 415 

 I Amo7'ia, radula, 222 

 513 . 2L 



